JLIP status for certification

1
JLIP status for certification
Daniel Bloch, Benoit Clément, Denis Gelé,
Sébastien Greder, Isabelle Ripp-Baudot (IReS
Strasbourg)
D0 note available estimate of b-tagging
efficiency 5 methods used .
light-tagging efficiency 2 methods used All
very consistent ! For JLIP cut lt 1 ?(b-tag)
35?2(statsyst),
. ?(light-tag)
1.1?0.1(statsyst)
2
Rejection of Kº and ?
Use SVT tools Reject K if 0.47?m(??)?0.52
GeV and ? if 1.10?m(p?)?1.13 GeV
3
Taggability
Require ? 2 tracks with pTgt0.5 GeV among 5
categories ?6 CFT ?3 SMT ?7 CFT 1 SMT
?7 CFT 2 SMT ?7 CFT 3 SMT
?7 CFT 4 SMT
MC
data
Taggability 71 in data .
85 in QCD MC
(Et(jet) gt 60GeV)
4
Track multiplicity in jet

• first four categories
  in data 2.8 (Etlt60) 3.5
  (Etgt60) in MC 2.5 ( "
  ) - 3.5 ( "   )
• tracks with ? 7 CFT and 4 SMT
• in data 1.5 (Etlt60) 1.9 (Etgt60)
  in MC 3.1 ( " ) - 4.2 ( "
  )
• ? in MC reject
• 55 of tracks with ?7 CFT and 4 SMT
• at random

5
JLIP performance in MC
all tracks . Fb 0.67
MC scale factor Fb ?(b,data)/?(b,MC)
b - tag
with rejection Fb0.85
c - tag
6
JLIP performance in data
vary the JLIP cut lt0.1, lt0.5, lt1, lt2
Very good agreement between data and MC !
7
Code location

• on krutenau-clued0/disk2/work/greder/jlip-code/
• strasbourg-analyze_v00.00.01.tar.gz
  ? a general independent framework to perform
  physics analysis
  see heppackage/doc/README.txt
• JLIP_d0framework.tar.gz
  ? JLIP macro to run in the D0
  framework see README.txt where example
  for implementation is provided